Questions tagged [concrete-block]

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4answers
707 views

How to put a clean hole in concrete block?

I am building a brick wall from concrete blocks. Note that these concrete blocks just provide a facade, don't hold any weight except an additional layer of same bricks above them. The blocks are 4&...
2
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2answers
56 views

Lateral force on posts resting on concrete deck blocks

I am building a floating deck that is not attached to the house and is 2ft in height. The 4x4 posts are inserted into and resting on top of a concrete decking block. The post is just sitting inside ...
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1answer
28 views

What is N/mm² in block characteristics?

In brick/block datasheet I found strength parameter in N/mm². Does it mean how much weight can a brick hold? So, for example 10 N/mm² of 10x10cm brick could hold 100.000N ~ 10 tons? Is this correct? ...
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0answers
48 views

Should the high side of a concrete block retaining wall be sealed?

I am mid-project in a DIY yard project. I have subbed out a large retaining wall to a civil / wall contractor. It’s 220 feet long, between 2-5′ in height, and makes 2 90-degree turns. It’s built to ...
2
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0answers
57 views

Help modifying window opening. American Concrete Institute standards? Building code?

I'm remodeling my kitchen and part of the work that I want to do involves modifying my window rough openings. Currently, the windows in my kitchen are lower than the countertop backsplash and I want ...
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1answer
63 views

What concrete type should I use for a pizza oven base slab?

I am building a pizza oven and kitchen area in my garden. I am trying to work out if there is a specific type of concrete I need. My question is only about the concrete slab (the foundation). The slab ...
1
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1answer
50 views

How to prepare the ground before laying concrete

I am building a pizza oven and kitchen area in my garden. I am trying to work out how to lay a 2m*2m concrete slab. My calculation for the weight (that the concrete slab needs to support) are Dense ...
0
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1answer
39 views

Building a retaining wall with dense concrete blocks, best way to lay each course?

I've seen a few walls that use the top method versus the more common stretcher/running bond, are there any benefits to doing it the first way?
0
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3answers
64 views

How to create nice corners when building a wall with these concrete blocks?

In a previous question, Why do many concrete blocks have this strange shape on either end?, I asked about the design of the concrete blocks having an I-shape at the ends. That explains how to make a ...
1
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1answer
73 views

Why do many concrete blocks have this strange shape on either end?

I want to build a simple wall out of concrete blocks and notice some have this strange shape, the ends look like a capital letter "I". As best as I can tell from any picture, this isn't like ...
0
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1answer
46 views

Bricking up door/damp

I'm about to block up this doorway and have noticed damp in the bottom corner. If I were to lay a DPC between the screed and first layer of blocks, would that solve the issue....or is it going to ...
1
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3answers
127 views

Is it safe to use a wedge expansion bolt in concrete blocks?

I want to hang a Rogue P-4 pull-up bar from a wall. The wall is concrete block with .5" of strapping on it, and 1" drywall over that. The pull-up bar is made with 1" steel tube. ...
0
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1answer
39 views

How can I fill in an interior hole in a block wall?

In an attempt to run Cat6 Ethernet cables to my living room, I cut a handy box sized hole in the the block, but was unable to run the cable down from the attic at the top of the wall (it was ...
0
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5answers
116 views

How to cut a concrete block without expensive tools?

I am building a wall from concrete retention wall bricks. I need to cut one brick in half so it can fit in the wall. The solutions here are too expensive, I only need to cut one brick. Is there any ...
0
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0answers
102 views

How to glue HDPE plastic to concrete blocks?

I am using PL 500 to glue concrete bricks to each other. I need to line the back of the brick wall with some high-density polyethylene (HDPE) plastic tarps for water-proofing. The PL 500 says it will ...
0
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1answer
36 views

Concrete block water wall footing requirements

My wife and I would like to build a 6 foot high, 8 foot long fountain wall, using concrete cinder block that will then be covered with stone veneer. My question is regarding the footing. We obviously ...
0
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1answer
31 views

Leveling first row of CMUs on uneven slab

So I may have a couple to many beers when pouring the slab for my new outdoor fireplace, and "forgot" that I needed to pour it level and not follow the slop of the patio. Whoops... https://ibb.co/...
1
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1answer
45 views

How to Adjust/Re-square 4' x 4' Concrete Slab

I have an approximately 4' x 4'concrete slab outside the door to my garage, like a small porch or whatever (see pic). Over the ~20 years life of the house it has moved, probably along with the dirt, ...
0
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1answer
190 views

Filling a CMU block wall in garage

I have a CMU foundation block wall in my garage that leads to my basement (picture below). Half of the cores are empty and it is about 8-9ft deep. I regularly treat this area and the garage with ...
1
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2answers
629 views

Concrete retaining wall with lean and crack, looking for input

We bought our 100 year old house “as-is” a year ago with various small cracks and a firm, but somewhat eroded foundation. This all needs to be addressed eventually, however, a large crack with ...
2
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2answers
159 views

Is a concrete slab required to support a block wall?

I'm starting to plan my build of a backyard grill station / pizza oven. I plan to build a concrete block wall about 4 feet high. I'll put either concrete or stone surface on top, as well as a 1600 lb ...
0
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2answers
683 views

1m high retaining wall build

I'm hoping to use 215mm concrete breeze blocks to build a 20m long retaining wall at 1m high. Do I need to build the blocks on their flat or can it be a regular single skin wall with piers every so ...
1
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1answer
1k views

Pouring concrete slab against 2 block walls and an asphalt driveway

I need to pour a small (~5' x ~5') concrete pad that will butt up against 2 basement block walls (A&B in the diagram) and my asphalt driveway (D in the diagram). I'm having some trouble figuring ...
1
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1answer
43 views

Repairing finish on basement block foundation wall

I have a room in a partially finished basement which was done by the previous homeowner which is needing repair to the walls. The house is old (1925), and the foundation is concrete block. The room in ...
0
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2answers
1k views

should concrete block wall be sealed on top?

I have a 2 story + basement townhome with 8" concrete blocks walls between my neighbors. At the top of each shared wall is a sheet metal cap. Some of the cavities have concrete in them but many are ...
2
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2answers
2k views

Can I fill cinder blocks with soil/dirt?

I have two short raised beds made of cinder blocks (8 in. and 16 in. tall) that isn't finished yet. I was wondering if it's okay to fill the voids of the blocks with excess soil from my yard? I live ...
2
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2answers
834 views

Filling hollow blocks one level at a time

I live in an area where basic building materials are available but expensive - there are not many places to rent tools and things are done slowly by hand. It is also an earthquake zone. I am thinking ...
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2answers
602 views

How can I remove this concrete wall anchor?

The anchor pictured was holding a hose reel, which has been removed. When I twist the part sticking out it just spins infinitely in either direction. I think it is something like a toggle or a molly ...
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2answers
369 views

Floating desk on concrete block wall

I have a concrete block wall with dot and dab plasterboard. I am looking to attach a wall to wall floating desk to it. I appreciate a number of questions relating to floating desks have been asked ...
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2answers
203 views

Lard as release agent?

So I’m learning how to make concrete pavers with this youtube video. He mentions that he uses lard as a release agent, so he brushes that into the mold. He also suggests cooking oil or motor oil for ...
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2answers
149 views

How do I build a fence with zero experience?

I've never built a fence or have never done any outdoor construction. I'm pretty handy and do most of my interior maintenance. I have a total of 780 feet where I need to put up a fence. I'm still ...
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0answers
91 views

How serious is this spalling?

Spalling is occurring on the corner of the top of the first story. I'm curious as to how serious this is.
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1answer
228 views

What is best way to make up difference between concrete and drywall in garage

The bottom part of wall in the carport was never covered with drywall. The distance from floor to bottom is around 9-10 inches. The bottom area is concrete blocks. The issue is distance from outer ...
0
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3answers
6k views

Mounting a pull up bar on hollow concrete block wall

I’m trying to mount a Pull-up bar like this one on a hollow concrete block wall. I’m planning on using some concrete sleeve anchors, but I also have seen people anchor some wood planks into the wall ...
4
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1answer
1k views

How to attach a TV mount to a resilient channel wall?

first SE post! MY QUESTION: How do I safely attach an articulating mount (tilt/pan) for a 75" LCD TV to a "sound deadening" wall that uses resilient channels? Thanks to the miracle of the ...
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2answers
1k views

Mounting a TV to Concrete Through Wood Paneling and Air Gap

I have a bit of a tricky question in regards to mounting my 65" TV. I have 3/4" knotty pine tongue and groove vertical wood paneling on my basement interior wall. The wall divides my finished and ...
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2answers
2k views

Hanging large TV and media cabinet on cement block covered with drywall

I'm planning on hang a 75" TV and a media center on my wall. It is cement block covered with drywall. Drywall is installed using some sort of metal furring strips so there are no studs. I believe all ...
0
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1answer
669 views

Drywall on conrete ceiling without studs, weight issues?

I have a question regarding heavy drywall hanging on a ceiling. I need to hang drywall ceiling without any studs (drywall designed for moisture, vapor barrier, straight onto concrete ceiling). I ...
1
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0answers
29 views

Ok to use green Spax lags as anchors in block wall?

I've got a basement project where I'm attaching 3in studs over 1 inch foam to a block wall (built ~1952). I was planning on using Tapcons, but the threads are not holding. The 1/4 green Spax lags look ...
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2answers
3k views

What to use to backfill around the concrete pier block?

Given the image above: What should I use to backfill the hole around the concrete pier block? I am thinking to use one of the following: (1) Paver base (again) (2) Gravel (3) Just the dirt that I ...
1
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2answers
793 views

Can you polish a concrete pier block?

I've been searching google for awhile but can't find a straight answer (every link is about walls/floors): Can I polish (or sand to be smoother at least) a concrete pier block? I have this one from ...
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2answers
3k views

Mounting TV on Thick Drywall + 1" Stud + Concrete blocks

I am trying to mount my 55" TV to the wall in our basement. It is an old (~1930) semi-detached house and I am a mounting it to the shared wall. As best as I can figure out, we have 1.5" drywall ...
0
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1answer
4k views

Filling large hole in concrete floating floor

I have a big hole in my kitchen floor (inserting a beam and post to take down a load bearing wall), and I'm now left with having to fill this hole (after dumping around 300 mm of concrete on the post ...
0
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1answer
274 views

Cutting Concrete Block Wall

I have an outdoor BBQ Island that has a grill and refrigerator installed in it. The Island is made out of 5 3/4" concrete block with wood top and tile on top of that. Right now I have a A/V Receiver ...
0
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1answer
130 views

Securing range hood with tile & concrete behind—should I pre-drill wider?

I need to secure a range hood on my new subway tile backsplash. Behind the tile is the thinset, drywall, then concrete block. I don't think my furring strips are ideally located for mounting purposes. ...
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2answers
96 views

Why are the deck footing blocks set away from the house several inches in this video?

I watched this video (building a free-standing porch) and wondered what is the reason that the back concrete blocks are not tight to the house wall. Basically he places them away from the house by a ...
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2answers
403 views

Are concrete blocks a cost effective, modern and strong solution to building a house? [closed]

I do many different house designs in SketchUp. With a 500,250,250mm concrete brick I believe I could create the walls for a house for as little as £1,000. Roughly 1k bricks will be needed to create ...
0
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1answer
4k views

How to insulate a concrete block shed - material / method

I've got a shed built of big solid concrete blocks, that also has a concrete floor. I want to insulate the whole lot so it can be fit for human habitation – so I need to insulate the floor, walls and ...
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2answers
66 views

84' wall leans 5",17' out. Pulling to plumb, + columns, save wall?

84' wall leans 5",17' out. Pulling to plumb, add columns, save wall? (https://i.stack.imgur.com/JvnVY.jpg)
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1answer
1k views

Mitigating an out of plumb foundation wall

My wife and I bought a house (built in 1985, Atlanta GA suburbs) with a fully finished basement that recently had a hot water heater leak that ruined the laminate floor. This disaster actually was ...